\documentclass{article}
\usepackage{amssymb,amsmath,amscd,concmath}
\pagestyle{empty}
\begin{document}
\begin{equation*}
p = \sum_(y=3000BC)^2005AD y^6+135.5y^4+83270y^2+53 sin \theta
\end{equation*}
\end{document}
